Steam-valve



(No Model.)

0; JENKINS.

STEAM VALVE.

No. 565,682. Patented Aug. 11,1896.

Z i? e 02 e Wrrplassas 672 'INVENTIJB' UNITED STATES PATENT OFFICE.

CHARLES JENKINS, OF BOSTON, MASSACHUSETTS.

STEAM- VALVE.

SPECIFICATION forming part of Letters Patent No. 565,682, dated August 11, 1896.

Application filed March 24, 1894.

To all whom it may concern.-

Be it known that I, CHARLES JENKINS, a

citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Steam-Valves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates to a steam-valve having the organization hereinafter specified,

'whereby two valve-seats are provided the valve, namely, an outer one of resilient or compressible material and an inner all-metal one.

It further relates to the means by which this result is obtained.

In the drawings, Figure 1 is a View of an angle-valve having the features of my invention, the parts showing the same being represented in vertical central section. Fig. 2 is an enlarged view in section of said parts. Fig. 3 is aview showing the valve lifted from its seat.

A is the inlet port or passage to the valve, andB is the outlet port or passage.

0 is a partial diaphragm at the upper or inner end of the inlet-port. It has upon the inner or upper side, or side toward the cham ber of the valve the flat or plane surface d and the wall d. It also has the threaded section d The surface d and the wall d form the bottom and outer wall of a recess (1 in which is held or contained the disk or ring D, of compressible or resilient packing, forming one of the valve-seats. The inner wall (1 of this packing-holding recess is formed by a section of the sleeve E. This sleeve has the threaded section 6, which screws into the threaded throat d of the diaphragm, the shoulder a, which bears against the surface (I of the diaphragm, and the shoulder e*, which bears against the outer surface of the packingdi'sk, and the corner F is ground and forms a metallic valve-seat. The sleeve therefore acts to form one wall of the packing-holding recess to secure the packing in place in its holding-recess, and the wall, being supported by the diaphragm 0, receives the closing pressure of the valve H and prevents any excess of pressure from reaching the packing D. The sleeve is secured in place by means Serial No. 504,923. (No model.)

of a turning wrench or device inserted into the recesses g, or between the lugs g, extending from the inner surface of the sleeve. The movable seat H is carried at the lower or inner end h of the valveoperating spindle h, which preferably is of the usual compression variety, and the seat swivels upon the end of the spindle. It has the outer cylindrical extension h which incloses the conical section W. The lower or inner edge of the outer section or wall closes upon the packing D and the conical section h upon the tapering seat F. I (See Fig. 1.) It will be seen that this construction protects the packingD from abrasion and wear in that the direct action of the steam when the valve isopen does not reach it, as it is shielded from it by the upper parts of the sleeve E, and when the valve is closed the inner metallic seat acts to prevent the steam from reaching it. The inner metal seat also prevents the crushing and undue wear of the packing D in the seating of the valve upon it. The construction also provides an easy method of renewing the packing D and the metal seat F, as it is only necessary to unscrew the sleeve E to remove both, and after placing a new disk, to return it to its original position, to fasten the new packing in place, and also to restore the inner metal seat.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In asteam-va1ve, the combination of the diaphragm 0 having the surface d, and wall cl with the sleeve E having the shoulder e and seat F, the packing D and the movable valve l-I having seats formed by the sections h h, as and for the purposes described.

2. In a steam-valve, the combination of the diaphragm 0 having the surface (1 and wall (1', the sleeve E having the shoulders e, 6 the sleeve screwing into the diaphragm and acting to hold the packing D upon the surface cl, and having the seat F, with the pack ing D and the movable member II of the valve having the seat-forming sections h it as and for the purposes described.

CHARLES JENKINS. Witnesses:

F. F. RAYMOND, 261, J. M; DOLAN. 

